Hello I cannot build gcc-3.0.3 when configuring with --prefix=/usr Default succeeds. My system: cat /etc/issue Welcome to SuSE Linux 7.3 (i386) - Kernel \r (\l). uname -a Linux linux 2.4.10-4GB #1 Tue Sep 25 12:33:54 GMT 2001 i686 unknown rpm -q glibc glibc-2.2.4-21 gcc -v Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/specs Configured with: ./configure : (reconfigured) ./configure --prefix=/usr : (reconfigured) ./configure : (reconfigured) ./configure Thread model: single gcc version 3.0.3 cc -v Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/specs Configured with: ./configure : (reconfigured) ./configure --prefix=/usr : (reconfigured) ./configure : (reconfigured) ./configure Thread model: single gcc version 3.0.3 libtool --version ltmain.sh (GNU libtool) 1.4.1 (1.922.2.34 2001/09/03 01:22:13) output of make, 2>1: make[2]: Leaving directory `/home/cross/us/tools/gcc/gcc-3.0.3/i686-pc-linux-gnu/zlib' make[1]: Leaving directory `/home/cross/us/tools/gcc/gcc-3.0.3/i686-pc-linux-gnu/zlib' make[1]: Entering directory `/home/cross/us/tools/gcc/gcc-3.0.3/i686-pc-linux-gnu/boehm-gc' /bin/sh ./libtool --mode=compile /home/cross/us/tools/gcc/gcc-3.0.3/gcc/xgcc -B/home/cross/us/tools/gcc/gcc-3.0.3/gcc/ -B/usr/i686-pc-linux-gnu/bin/ -B/usr/i686-pc-linux-gnu/lib/ -isystem /usr/i686-pc-linux-gnu/include -DSILENT=1 -DNO_SIGNALS=1 -DJAVA_FINALIZATION=1 -DGC_GCJ_SUPPORT=1 -I. -I. -I././targ-include -I././.././libc/include -fno-builtin -g -O2 -c allchblk.c libtool: compile: unable to infer tagged configuration make[1]: Leaving directory `/home/cross/us/tools/gcc/gcc-3.0.3/i686-pc-linux-gnu/boehm-gc' Afterwards another problem arose (after I built gcc with default config): Could not build xemacs 21.1.14, configure with defaults produced: (I reported this to xemacs team) int main() { db_open() ; return 0; } configure:11860: checking for dlfcn.h configure:11868: gcc -E -I/usr/X11/include conftest.c >/dev/null 2>conftest.out configure:11899: checking for dlopen in -ldl configure:11915: gcc -o conftest -g -O3 -Wall -Wno-switch -I/usr/X11/include -L/usr/X11/lib conftest.c -ldl -lXm -lcompface -ltiff -ljpeg -lz -lXmu -lXt -lXext -lX11 -lSM -lICE -lgdbm -lgpm -lncurses -lm -lshell32 -lgdi32 -luser32 -lcomctl32 -lgcc -lc -lgcc /usr/lib/crtn.o 1>&5 configure:12145: checking how to build a shared library configure:12236: checking for dlerror configure:12262: gcc -o conftest -g -O3 -Wall -Wno-switch -I/usr/X11/include -L/usr/X11/lib conftest.c -lXm -lcompface -ltiff -ljpeg -lz -lXmu -lXt -lXext -lX11 -lSM -lICE -ldl -lgdbm -lgpm -lncurses -lm -lshell32 -lgdi32 -luser32 -lcomctl32 -lgcc -lc -lgcc /usr/lib/crtn.o 1>&5 configure:12302: gcc -o conftest -g -O3 -Wall -Wno-switch -I/usr/X11/include -L/usr/X11/lib conftest.c -lXm -lcompface -ltiff -ljpeg -lz -lXmu -lXt -lXext -lX11 -lSM -lICE -ldl -lgdbm -lgpm -lncurses -lm -lshell32 -lgdi32 -luser32 -lcomctl32 -lgcc -lc -lgcc /usr/lib/crtn.o 1>&5 ./configure: line 12325: 25422 Segmentation fault ./conftest configure: failed program was: #line 12298 "configure" #include "confdefs.h" int main(int c,char *v[]){return 0;}